Hot-air furnace.



No. 658.855., Patentedgoct. 2,1900.

' A. w. MAncoFsKY.

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(Application led Jan. 10, 1900.)

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ALEXENDER MARCOFSKY, OF CLEVELAND, OHIO.

HOT-AIR FU RNAC.

SPECIFICATION forming part of Letters Patent No. 658,855, dated October 2, k1900.

Application filed January 1900. Serial N0' 983 (N0 model-.l

To all whom it may concern:

Be it known that I, ALEXENDER W. MAR- OOFSKY, a resident of Cleveland, county of Cuyahoga, and State of Ohio, have invented certain new and useful Improvements in Hot- Air Furnaces; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in hot-air furnaces.

The primary object of the invention isto provide a hot-air furnace with an improved construction and arrangement of hot-air fines and to provide such an arrangement of hotair flues relative to the combustion-chamber of the furnace as -will result in a more thorough and economical utilization of the heat generated by the products of combustion within the furnace.

Another object of this invention is to provide an improved construction of removably supporting a smoke-iiue-engaging elbow centrally of the upper end of the combustionchamber and render the said elbow not only capable of being removed when ithas been burned out and has to be replaced by a new elbow, but to render the elbow capable of being swungin a horizontal plane, so as to accommodate itself into alinement with any smokeflue extending from the furnace in a straight line to the chimney without requiring the eniployment of other elbows or bends in the line of the smoke-flue and to accommodate the arrangement of the furnace with respect to the desired arrangement of the flue-supply aperture -without interfering with a straight connection between the aforesaid elbow and the chimney.

With these objects in view and to the end of rendering the construction simple and durable and to the end of realizing other advantages hereinafter appearing the invention consists-in certain features of construction and combinations ofparts hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure I is a side elevation, largely'in central vertical section, of-a hot-air furnace embodying my invention. Fig. II is a horizontal section on line II II, Fig. I, looking downwardly. Fig.

pot f section.

III is a horizontal section on line III III, Fig. I, looking upwardly. Fig. IV is a top plan of the fire-pot of the furnace. Fig. V is a vertical section on line VV, Fig. IV. Fig. VI is a-vertical section on line VI VI, Fig. IV. Fig. VII is a vertical section showing the connection of the smoke-ilue-connecting elbow with the top of the smoke-chamber.

Referring to the drawings, a designates the lower portion or section of a `fire-pot that is supported upon the shell or casing c of the ash-pitiin the usual manner, and g represents the grate between the ash-pit and the fire-pot. In the furnace illustrated the lower fire-pot section is a vertically-arranged open-ended cylinder composed of cast-iron.

b designates the upper fire-pot section, that is supported upon the upper end of the lower yfire-pot section d in any approved manner. lThe upper fire-pot section b consists, preferably, of an upwardly-flaring ring-shaped or annular casting. The upper re-pot section b is provided with two series of upwardlyflanged apertures. brrepresents'the apertures of one of thesaid series of apertures.

b3 designates the flanges of the apertures b', and b4 represents the flanges of the other apertures b2. The apertures b are arranged vat equal intervals or approximatelyequal intervals circuinferentially of the {ire-pot section b and in the main between the central portion and outer edge of the said fire-pot section.

The furnace illustrated has six apertures b'. The fire-pot section b, as illustrated, has five apertures b2, arranged, respectively, centrally between two adjacent apertures b' and in the main between the central portion and the inner edge of the fire- The upper -ire-pot section is provided, therefore, with two series of upwardly-flanged apertures, with the apertures of the one series and the apertures of the other series arranged alternately. The flanges of all of the said apertures project upwardly and have their upper edges preferably in the same horizontal plane. The flanges of the apertures b2 slightly overhang the chamber of the 'fire-pot.

. The' upper fire-pot section' is composed of a single casting, and at its upper edge is provided with an external annular flange b5, that supports the casing o f the smoke-chamber d.

IOO

(Z designates the surrounding wall of the smoke-chamber, and (Z2 the top of the said chamber. The top (Z2 rests upon the upper end of the wall d.

An air-chamber e (see Fig. I) surrounds the fire-pot, the ash-pit, and the casing of the smoke-chamber and extends a suitable distance above the smoke-chamber in the usual manner. The chamber e at the bottom is provided with any suitable number of airinlets e and at its upper end has any suitable number of air-outlets e2.

The top (Z2 of the smoke-chamber is provided with apertures d3, that are in open relation with the vertically-arranged air-fines f, that extend from the said top to and rest upon the flanges b3 of the apertures b' of the upper fire-pot section. All of the apertures b and b2 of the upper tire-pot section are in open relation with the air-chamber e. Hence the air-fines fare in open relation at their lower ends with the said air-chamber e at the outer side of the fire-pot and have their upper ends in open relation with the said air-chamber e at the top of the smoke-chamber. Airfiues 71y rest upon the upper edges of the fianges b4 of the apertures b2 of the upper tire-pot section and extend from the said apertures upwardly and over the fire-pot and have a discharge-opening h in common at their upper ends. In other words, the air-fines h converge upwardly and have their upper ends formed into an outlet in common centrally over the fire-pot. The said f'lues 7L and their common outlet are formed, preferably, in one and the same casting. o

The top (Z2 of the smoke-chamber has apertures (Z4, that are engaged by the upper-ends of air-fines 7c, that extend downwardly and inwardlyfrom the said top and terminate at their lower ends in an inlet lo', in common that registers with the common outlet 71, of the flues h. In other words, several air-fines that are in open relation with the air-chambel' e at the top of the smoke-chamber converge downwardly and are formed, preferably, in one and the same casting. By the provision of the fine-forming castings within the smoke-chamber the products of combustion rising into or circulating within the said chamber are advantageously utilized. The casting composing the fines 7a rests upon the upper edges of the casting composing the fines 7L, and the lower wall of the last-mentioned casting at the bottom of the common outlet for the fiues forming the said casting is provided with an upward bulge, so as to form a small dome h2 centrally above the fire-pot, which dome is open at the bottom. The said dome is instrumental in the formation of an eddy of air within and below the same, so as to prevent overheating of the said domeforming casting, and the said dome accommodates also au expansion of the domeforming wall of the casting without injury to the casting.

The top (Z2 of the smoke-chamber is centrally provided with an upwardly flanged aperture d5, and (ZG designates the upwardlyprojecting annular ange surrounding the said aperture. A short flue m is secured to the said flange and depends from the latter into and centrally of and communicates with the upper portion of the smoke chamber. The flue m has its upperend in open relationwith the elbow n, that has its upright and inner portion embracing the aforesaid fiange d6 and provided with an external annular flange a', (see Fig. VIL) that is seated upon the top (Z2 of the smoke-chamber. The elbow can be turned upon the top LZ2 in a horizontal plane around the flange d in the one direction or the other. connected with a smoke-flue o, that leads to the chimney. (Not shown.) Several latches fr' (see Fig. VII) for securing the elbow to the top LZ2 are provided and arranged at suitable intervals along the edge of the flange a. Each latch r is vertically pivoted or swiveled at one end, as at fr, to the top d2 and has its other end overlapping the upper side of the flange n in the operative position ofthelatch. Obviously, the removal of the elbown merely requires the swinging of the latches in the direction and to the extent required to release the elbow.

I have not illustrated any manner of packing the joints between adjacent or contiguous parts, because such packing can be done in any approved manner and forms no part of my present invention.

l. A hot-air furnace having a fire-pot; a smoke-chamber formed above and in open relation with the fire-pot; an air-chamber surrounding the smoke-cham ber andthe firepot, several air-fines in open relation with the airchamber at the outer side of the fire-pot and arranged at suitable intervals about the firepot, which flues converge upwardly, are formed in one and the same casting, and have their upper ends terminating in acommon outlet, and several air-flues in open relation with the aforesaid air-chamber at the top of the smoke-chamber and converging downwardly from the said top, formed in one and the same casting and having their lowerends terminating in a common inlet that registers with the aforesaid outlet of the lower and upwardly-converging fines.

2. A hotair furnace having a fire-pot; a smoke-chamber formed above and in open relation with the fire-pot; an air-chamber surrounding the smoke-chamber and the fire-pot, several air-flues in open relation with the airchamber at the outer side of the tire-pot and arranged at suitable intervals about the tirepot, which flues converge upwardly, are formed in one and the same casting, and have their upper ends terminating in a common outlet, several air-fines in open relation with the aforesaid air-chamber at the topI of the smoke-chamber and converging downwardly from the said top, formed in one and the same In Fig. I the elbow is shown casting and having their lower ends termi-V nating in a common inlet that registers with the aforesaid outlet of the lower and upwardly-converging flues, and the lower wall of the first-mentioned casting, at the bottom of the common outlet for the fiues forming the said casting, being provided with an upward bulge so as to form a small dome h2 centrally above the fire-pot, which dome is open at the bottom, substantially as shown, for the purpose specified.

3. A fire-pot for ahotair furnace divided. y centrally into two sections arranged one above ing upwardly from the upper end of the lower section and having several upright flanged air-conducting apertures in its inner and lower portion, an air-chamber surrounding the smoke-chamber and the fire-pot, a flueforrning casting upon the aforesaid flanges and leading from the aforesaid apertures upwardly and inwardly over the re-pot and having the flues formed therein terminating at the upper end of the casting in a common outlet, and another flue-forming casting resting upon the upper and outlet-forming end of the first-mentioned casting and having separate flues formed therein and leading upwardly and outwardly from the upper end of the first-mentioned casting to the top of the smoke chamber and there communicating with the aforesaid air-cham ber, substantially as shown, forthe purpose specied.

Signed by me at Cleveland, Ohio, this 31st day of October, 1899.

ALEXENDER W. MARCOFSKY.

Witnesses:

C. H. DORER, A. H. PARRATT. 

